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Welding wire powder flux core, flux-cored wire, preparation method and application of flux-cored wire and ultrahigh-strength steel welding process

A technology of flux-cored welding wire and welding wire, applied in welding media, manufacturing tools, welding equipment, etc., can solve the problems of restricting the development and application of ultra-high-strength steel and the development of ultra-high-strength welding materials. No cracks, beautiful appearance of welding seam

Active Publication Date: 2021-01-29
北京智双科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, the development of corresponding ultra-high-strength welding materials is seriously lagging behind, which limits the development and application of ultra-high-strength steel.

Method used

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  • Welding wire powder flux core, flux-cored wire, preparation method and application of flux-cored wire and ultrahigh-strength steel welding process

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preparation example Construction

[0072] According to a third aspect of the present invention, a method for preparing the above-mentioned flux-cored welding wire is provided, comprising the following steps:

[0073] First roll the steel strip into a U-shaped section shape, then fill the welding wire powder flux core prepared according to the formula into the U-shaped steel strip according to the filling rate of 12-18%, roll and reduce the diameter to 1.0-1.6 mm of welding wire.

[0074] Specifically, the welding wire is realized in the following ways:

[0075] A 12×0.8 (width 12mm, thickness 0.8mm) SPCC steel strip is selected. Roll it into a U shape first. According to the ratio design of the flux core, it is formulated into powder and fully mixed, powdered and rolled and reduced into a welding wire with a diameter of 1.2mm.

[0076] According to a fourth aspect of the present invention, an application of the above-mentioned flux-cored welding wire in the field of manufacturing pressure vessels or shipbuil...

Embodiment 1

[0095] A 1500MPa grade ultra-high-strength steel welding flux-cored wire, including SPCC hollow wire and powder flux core, the proportion of powder flux core is: 8.5% high-carbon ferrochrome, 6% electrolytic manganese, 8% ferromolybdenum, vanadium Iron 6%, titanium iron 5%, nickel powder 10%, bismuth oxide 0.6%, rutile 28%, sodium fluoride 5%, aluminum iron 2.8%, manganese carbonate 0.6%, potassium feldspar 0.4%, iron powder balance, The filling rate was 12.5%.

[0096] The welding process is: voltage 25V; current 230A; wire feeding speed: 410 / min; gas flow rate: 15L / min; distance from the welding wire to the contact tip: 19mm. The above-mentioned process has good welding manufacturability, small spatter, beautiful weld shape, and no cracks on the surface. The mechanical properties of deposited metal are shown in Table 1.

Embodiment 2

[0098] A 1400-1600MPa grade ultra-high-strength steel welding flux-cored wire, including SPCC hollow wire and powder flux core, the proportion of powder flux core is: high carbon ferrochrome 12%, electrolytic manganese 7%, molybdenum iron 6% , Fe-Vanadium 7%, Ferro-Titanium 2%, Nickel Powder 15%, Rutile 25%, Sodium Fluoride 3.8%, Al-Fe 4%, Bismuth Oxide 0.5%, Manganese Carbonate 0.7%, Potassium Feldspar 1.4%, Iron Powder I amount, the filling rate is 16.5%.

[0099] The welding process is: voltage 26V; current 240A; wire feeding speed: 510 / min; gas flow rate: 25L / min; distance from the welding wire to the contact tip: 25mm. The above-mentioned process has good welding manufacturability, small spatter, beautiful weld shape, and no cracks on the surface. The mechanical properties of deposited metal are shown in Table 1.

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Abstract

The invention provides a welding wire powder flux core, a flux-cored wire, a preparation method and application of the flux-cored wire, and an ultrahigh-strength steel welding process, and relates tothe technical field of welding materials. The welding wire powder flux core is prepared from the following components in percentage by weight: 7-12% of high-carbon ferrochrome, 5-15% of electrolytic manganese, 5-10% of ferromolybdenum, 3-10% of ferrovanadium, 1-5% of ferrotitanium, 10-20% of nickel powder, 25-35% of rutile, 2-5% of sodium fluoride, 1-5% of ferro-aluminum, 0.3-0.8% of bismuth oxide, 0.4-1.0% of manganese carbonate, 0.4-2.0% of potassium feldspar, and the balance of iron powder. The flux-cored material and the flux-cored wire can meet the welding requirement of ultrahigh-strength steel with the tensile strength of 1400-1600 MPa, the welding manufacturability is good, splashing is small, weld joint forming is attractive, the surface is free of cracks, and formed deposited metal is good in mechanical property.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a welding wire powder flux core, a flux-cored welding wire, its preparation method, application, and an ultra-high-strength steel welding process. Background technique [0002] In addition to high tensile strength, high-strength steel also requires certain plasticity and toughness, as small as possible notch sensitivity, high fatigue strength, certain corrosion resistance, good process performance and low price. Ultra-high-strength steel has now developed into an important class of steel with a wide range of applications. It is widely used in fields with special requirements for strength, and its application range is continuously expanding to construction, machinery manufacturing, vehicles and other industrial equipment. . [0003] At the same time, the development of corresponding ultra-high-strength welding materials is seriously lagging behind, which limits the deve...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/12B23K35/40B23K9/16
CPCB23K35/3066B23K35/0266B23K35/406B23K9/16
Inventor 杨佰超娄宇航陈夷邹付兵
Owner 北京智双科技发展有限公司